Motor drive unit for a window shade



FIG. 1 is a perspective view of the ornamental design for a motor drive unit for a window shade;

FIG. 2 is a bottom plan view of the ornamental design for a motor drive unit for a window shade;

FIG. 3 is a top plan view of the ornamental design for a motor drive unit for a window shade;

FIG. 4 is a rear plan view of the ornamental design for a motor drive unit for a window shade;

FIG. 5 is a front plan view of the ornamental design for a motor drive unit for a window shade;

FIG. 6 is a left side plan view of the ornamental design for a motor drive unit for a window shade;

FIG. 7 is a right side plan view of the ornamental design for a motor drive unit for a window shade;

FIG. 8 is a perspective view of a second embodiment of an ornamental design for a motor drive unit for a window shade;

FIG. 9 is a second perspective view of the second embodiment of the ornamental design of FIG. 8 from a different angle;

FIG. 10 is a bottom plan view of the second embodiment of the ornamental design;

FIG. 11 is a top plan view of the second embodiment of the ornamental design;

FIG. 12 is a rear plan view of the second embodiment of the ornamental design;

FIG. 13 is a front plan view of the second embodiment of the ornamental design;

FIG. 14 is a left side plan view of the second embodiment of the ornamental design; and,

FIG. 15 is a right side plan view of the second embodiment of the ornamental design. 

The ornamental design for a motor drive unit for a window shade control system, as shown and described. 